Set screw



26, i933.,v c. G. oLsoN SET .SCREW Filed Dec. 5, 1930 as; Figure Patented Dec. 26', .1933

UNITED .sT-Ares,

SETv SCREWVl CarlG. Olson, Chicago, proof Lock` Washer Application December 5, 8 Claims.`

to self-locking the self prevent the inadvertent re- I amfamiliar, the solid or does not contion of the screw prese not resilient, the only resiliency in the screw be- 0 ing present at the lower portions of the threaded sections which join the solid section.. In4 view of the foregoing, to employ this bifurcated self-locking screw/device for relatively-short set screws. o o f It is one of the primary objects of my present invention to provide a bifurcated screw which is of such a constructi n that a relatively short screw will function as a self-locking .screw with the same effectiveness as a longer screw. More specifically, my invention contemplates i the provision of a self-locking-.screw of. the bifurcated type set forth above,-in which the solidpornon Iwhich joins the bifurcated sections is sumcientl'y resilient to materiallyontribute to the selfflocking effectiveness of the screw.

Still more specifically, plates the provision of J n connecting a bifurcated screw, .in

the bifurcated secsubstantially' its entire length, or, in other words, from the point where it ,joins one vof the biiurcations't'o the point where it joins the other bifurcation. f The foregoing and other obiectsand advan-l tages will --be more apparent from the 'following' 5 detailed description when considered in con' nection with the accompanying drawing, wherein-, v

Figure 1 is aside elevational view of a set'screw whichis representative of one embodiment of my invention; e s

-Figure 2 is a plan view of the screw shown in '.Flgurel;l .A Y

Figure 3 discloses the set' screw'of Figures 1 and2niounted withinawork piece; v

4 is a modifl'edconstmctlpn disclosing Company, corporation of Delaware s cordance with the In all of these types of set are Joinedby a it has heretofore been impractical extremities of my invention contemni., Assignmto snakschica, n1., s;

193e. sei-isi No. 500,161

c1. rs1-14) the manner in the self-locking which a relatively long screw of type may be constructed in acteachings of my present invention;

Figure 5 is a side elevational v iew of another 50 modified construction; and

Figure 6 discloses a still f rther alternative form which embodies my invention.

Referring now to the drawing more in detail wherein likev numerals have been employed .to designate. s' ar parts throughout the various figures, it will be seen that in Figures 1 to 3 inclusive I have disclosed a set screw designated generally by thenumeral 10. This set screw vcomprises bifurcated threaded sections 12 which connecting section 14. This connecting vsection 14 includesy a pair of arcuate resilient portions 16 and a section 18 intermediate thereof ,f which'is adapted to be tightened against a -work piece' 20, Figure 3, when the screw is mount-y 75 ed within a member 22. A central transverse recess 24 is presented between the threaded sec-v tions 12, and it will be apparent that the outer the sectionsl2are sprung outwardly from a central plane of the screw so that, 80 when the screwis tightened within the work piece,` as shown in Figure 3, thesethreaded sec.-v vtions 12 will resillently bear against the companion threads of the work piece, and thereby frictionally,oppose any .tendency to loosen the screw; l

-Particular attention is directed to the manner in which the connecting section 14 is formed. 1t will be noted that this cnnecting section 14 is resilient over substantially its lentire length, namely, over the length which comprises the arcuate portions 16`, and hence it' may rbe stated that the section 14 which connects the bifurcations or threaded sections 12, greatly facilitates the ease with which the threaded sections 12 may 95 bedefiected outwardly, as shown in Figure l. By reason of this construction, the screw 10 maybe made relatively short as compared with setscrews ofthe bifurcated type which have been employed heretofore. In these conventional types of" bifurcated lset screws, all the resiliencyv which enabled the defiecting ofthe threaded section, was presented only at .theI point where the threaded sections loin theconnecting section. This conventional construction is to be clearly disti'nv105 guishedfrom my improved device, wherein the section is inherently resilient, and hence materially lcontributes tothe ease with which the bifurcations or threaded sections may be deflected. .This resilient feature of the con- 110 necting section is particularly advantageous in instances where the set screw is of relatively large diameter. or where the screw is comparatively 1n 'mame s, I have shown an alternative set threaded sections 12a. and a connecting section 14a, which includes a pair of resilient portions 16a. /This set screw 10a is relatively short in length as compared with the diameter, and by removing a portion oi' the stock on each side of the screw adjacent the bottom of the transverse recess 24a, I present the resilient tire length, and thereby greatly facilitates the deequal in thickness throughout its length.

In Figure 4, I have disclosed a set screw designated generally by the numeral 10d. and this screw is longer than the screws which have been described thus far. It will be seen that this screw 10d includes a central transverse recess 24d which separates threaded sections 12d. I provide receases 28 on opposite sides of the screw body so as to present oppositely disposed resilient sections ha or members 16d, which comprise a connecting section designated generallyv by the numeral 14d. Extending downwardly from this connecting section 14d is a pair of threaded-sections 30'which are separatedby a suitable recess 32. This recess 32'al'so cooperates in rendering the connecting section 14d resilient. 'Ihe threaded sections 12d are deflected so that, when the screw is secured within the work piece, said section will automatically bear against the thrds thereof with Asuiiicient force to counteract any tendency to loosen the screw. a

,Fromtheforegoing itwillbe apparent that myinventlon contemplatestheprovisionofscrews or 'set screws of the bifurcatedm which` the connecting section extending cations is resilient throughout substantially its entire length. By this wnnernmainione of Figures 1 and 5 have been designated constructionlamableto.

specincembodiments theinventicninthedrawing.itwillbeclearthis said invention is capable of numerous other modifications of structural design without departing from the spirit and scope thereof.

outward ilexing of said screw elements.

2. A self-locking screw including a bifurcated threaded body presenting two screw elements. and

facilitate the outward iiexing of. said screw elements.

3. A self-locking screw having a transverse slot i an enlarged transverse aperture, the stock surrounding said enlarged apertine presente ing a resilient connection, whereby to facilitate the outward ilexing of the threaded sections positioned on opposite sides of the slot.

4. A self-lockingscrew including a screw body having a transverse slot to present oppositely disposed threaded sections, the portion of the stock surrounding the bottom of the slot presenting a connection for said 'threaded sections, the exterconnecting section being coni flgurated to render the same resilient and thereby facilitate the outward flexing of said threaded sections to render the screw self-locking.

5. A self-locking screw including a screw body 11l having a transverse slot to prent oppositely disposed threaded sectiom, the portion of the stock surrounding the bottom of the slot presenting a connection for an thereby facilitate the outward flexing of said aded sections to render the same self-lock- 6: A self-locking screw including a screw body' 12( ving a transverse slot to present oppositely disat least of said rically reduced in cross sectional area on opposite sides to resilient and thereby facilitate the outward iiexing of said threaded sections to render the same self-locking.-

'LA selflocking setscrew including apairot 130 oppositely disposed screw sections separated by a transverse slothaving a width which is equal tosubstan one-thirdofthediameterofthe screw,andaresilientconnectingsectionextending between said said screw section being deflected laterally so as to render saidsections self-locking when applied to the threaded apertureofaworkpiecer.

8. A self-locking 

